Matt Yglesias makes the case that, in fact, Republicans were responsible for trouble in both 2013 and 2014. In both cases, Republicans pressed to add a provision that Democrats opposed — most recently one that rolled back a portion of the Dodd-Frank financial regulation law in the funding bill that passed the House yesterday and is moving to the Senate .

There’s something to this argument, but it really understates what was special about Tail Gunner Ted’s shutdown in 2013.

Of course, part of normal bargaining involves a certain amount of brinksmanship and part of deliberate shutdown politics can involve claims that the other side is “really” responsible for the breakdown.

The process goes off the rails when it includes excessive demands, backed up by ultimatums, that are far outside what appears to be the normal range of bargaining. Demanding a repeal of Obamacare (or “defunding”) despite a solid Democratic majority in the Senate and a Democrat in the White House is of a different order than a fight about a relatively small provision of Dodd-Frank, or the other policy riders added to the current funding bill.

That was true this time, too — but it only involved a small group of Republicans. The bulk of mainstream conservative Republicans made policy demands (and will win some policy victories if the Senate, as expected, passes the bill this weekend). But that was in the context of normal bargaining, in which Democrats also won concessions. Sure, there’s always the implicit threat that a failure to reach a deal will cause a shutdown. But that’s very different from the attitude of the Cruz group in 2013 (or New Gingrich’s similar plan in 1995) to use a shutdown as a strategy for getting the other side to agree to something outside of normal negotiating.

What Warren and the other liberal dissenters have done this week is equivalent to saying that the deal isn’t quite good enough for them. They’re not starting from the assumption that they should hold their breath until they get their way… and then looking around for something to demand. This wasn’t extortion for the sake of extortion. Just regular sausage making.